- Maintained and enhanced a checkout system, integrating new payment methods to optimize transaction processes.Developed new features aimed at enhancing conversion rates and improving user engagement.Conducted A/B tests to optimize user interface and functionality, leveraging data-driven insights.- Identified and fixed issues, guaranteeing a seamless user experience and optimal operational performance.Addressed security vulnerabilities and applied best practices to safeguard user data and transactions.- Implemented unit tests and end-to-end (E2E) tests to ensure code quality and reliability.Implemented CI/CD pipelines using GitHub Actions for automated testing and deployment.- Managed internationalization (i18n) for multi-language support, enhancing accessibility for global users.- Assisted in migrating from Nuxt.js 2 to Nuxt.js 3, ensuring compatibility and leveraging new features.Maintained up-to-date knowledge of frontend frameworks and technologies, incorporating the latest advancements.- Optimized front-end performance through code refactoring, caching strategies, and performance profiling.

- Maintained microservices within an AWS Cloud environment, leveraging CI/CD methodologies to ensure applications were highly available, scalable, and resilient. This included automating deployment pipelines and monitoring performance to maintain optimal operations.- Employed Java 11 and the Spring Boot 2 ecosystem, working extensively within a microservices architecture. This involved designing and developing RESTful APIs, implementing service discovery, and handling inter-service communication efficiently.- Addressed and resolved bugs reported by penetration tests, enhancing the security and robustness of the applications.

- Created and supported tax issuance products, connecting with electronic invoice (NFS-e) providers through web service/REST. Also, enhanced the product's technical aspects to improve performance and ensure compliance with SEFAZ technical notes.- Utilized Java 8 and other relevant technologies to develop and maintain the product's functionalities.